25730263 has 4 divisors (see below), whose sum is σ = 27709528. Its totient is φ = 23751000.

The previous prime is 25730251. The next prime is 25730267. The reversal of 25730263 is 36203752.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25730263 - 2¹⁷ = 25599191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25730267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 989613 + ... + 989638.

It is an arithmetic number, because the mean of its divisors is an integer number (6927382).

Almost surely, 2^25730263 is an apocalyptic number.

25730263 is a deficient number, since it is larger than the sum of its proper divisors (1979265).

25730263 is a wasteful number, since it uses less digits than its factorization.

25730263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979264.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 25730263 is about 5072.5006653523. The cubic root of 25730263 is about 295.2215629392.

The spelling of 25730263 in words is "twenty-five million, seven hundred thirty thousand, two hundred sixty-three".